ISO 9295:2015 PDF

Scope: This International Standard specifies four methods for the determination of the sound power levels of high-frequency noise emitted by machinery and equipment in the frequency range covered by the octave band centred at 16 kHz, which includes frequencies between 11,2 kHz and 22,4 kHz. They are complementary to the methods described in ISO 3741 and ISO 3744. The first three methods are based on the reverberation test room technique. The fourth method makes use of a free field over a reflecting plane. The test conditions which prescribe the installation and operation of the equipment are those specified

ISO 9295:2015 Referenced Document

ISO 3741:2010 Acoustics - Determination of sound power levels and sound energy levels of noise sources using sound pressure - Precision methods for reverberation test rooms
ISO 3744:2010 Acoustics - Determination of sound power levels and sound energy levels of noise sources using sound pressure - Engineering methods for an essentially free field over a reflecting plane
ISO 3745:2012 Acoustics - Determination of sound power levels and sound energy levels of noise sources using sound pressure - Precision methods for anechoic rooms and hemi-anechoic rooms
ISO 6926:1999 Acoustics - Requirements for the performance and calibration of reference sound sources used for the determination of sound power levels
ISO 7779:2010 Acoustics - Measurement of airborne noise emitted by information technology and telecommunications equipment
ISO 9613-1:1993 Acoustics; attenuation of sound during propagation outdoors; part 1: calculation of the absorption of sound by the atmosphere
ISO/IEC Guide 98-3:2008 Uncertainty of measurement — Part 3: Guide to the expression of uncertainty in measurement (GUM:1995)

2015 ISO 9295:2015 Acoustics - Determination of high-frequency sound power levels emitted by machinery and equipment
1988 ISO 9295:1988 Acoustics; measurement of high-frequency noise emitted by computer and business equipment